Can we use "this" keyword without creating object of class in java?

Question

How object class is inherited into all the Java class without having extends Keyword. I mean what is the logic for making a class to inherit to all the other classes.

Answer 1

Yes, because the this object reference can be used inside any non-static method to refer to the current object

The common uses of the this reference are:
To pass a reference to the current object as a parameter to other methods

someMethod(this);

To resolve name conflicts Using this permits the use of instance variables in methods that have local variables with the same name